English
中文
The coal-based activated carbon filter material used in water treatment should meet the requirements of large adsorption capacity, fast adsorption rate, and good mechanical strength. In addition to other internal conditions, the adsorption capacity of carbon is mainly related to its appearance.
The adsorption rate is mainly related to the particle size and pore distribution.
The transition pores of the activated carbon filter material used in water treatment (radius 20-1000a) are relatively developed, which is conducive to the adsorption of pollutants (water contaminants) to microscopic transition. The smaller the particle size, the faster the adsorption rate, but the greater the water head loss. Generally, 8-30 mesh is suitable.
When the water quality is acidic, the adsorption capacity of coal-based activated carbon for anion substances is relatively weakened; when the water quality is alkaline, the adsorption capacity of coal-based activated carbon for cation substances is weakened. Therefore, the unstable pH of water quality will also affect the adsorption capacity of coal-based activated carbon.
The adsorption capacity of coal-based activated carbon filter material is related to water temperature, water quality, etc. The higher the water temperature, the stronger the adsorption capacity of coal-based activated carbon; when the water temperature reaches 30℃, the adsorption capacity is higher, and the adsorption capacity is lower.
When the water quality is acidic, the adsorption capacity of activated carbon for anion substances is relatively weakened. When the water quality is alkaline, the adsorption capacity of coal-based activated carbon for cation substances is weakened.
Therefore, the instability of water quality will also affect the adsorption capacity of coal-based activated carbon.
Generally, after purchasing coal-based activated carbon filter material, we need to clean it once. Pure water can be used for cleaning, because tap water contains substances such as calcium and magnesium, which will be charged by carbon.
If using tap water, clean it and clean the surface carbon powder. Do not wash for too long to avoid excessive absorption of calcium and magnesium in the water.
Because coal-based activated carbon absorbs too many impurities and loses its effectiveness, it needs to be replaced about every month. There is a method to recover the invalid carbon effect, which is to boil it in water to restore its adsorption, but it should not be used repeatedly. It is recommended to replace the coal-based activated carbon filter material at least every two months.
Although coal-based activated carbon is widely used in the field of water treatment, it must be said that there are still many deficiencies and shortcomings in its performance. Sometimes, simply using a single filter medium cannot achieve the ideal filtering effect for water quality with higher requirements. Therefore, multiple water treatment filter media must be used at the same time to achieve the expected filtering effect for people.
